Camera module and electronic device

ABSTRACT

A camera module includes a metal yoke, a holder, a plastic barrel, a plurality of plastic lens elements and a plurality of metal conducting elements. The holder is connected to the metal yoke for forming an inner space. The plastic barrel is movably disposed in the inner space and includes at least one buffering part. The plastic lens elements are disposed in the plastic barrel. The metal conducting elements are at least one leaf spring and a wire element, wherein the metal conducting elements are connected to the plastic barrel. Before the at least one buffering part contacts a contacting part of the at least one leaf spring, there is a gap distance between the at least one buffering part and the contacting part of the at least one leaf spring.

RELATED APPLICATIONS

The present application is a Continuation of U.S. application Ser. No.16/427,392, filed on May 31, 2019, which claims priority to TaiwanApplication Serial Number 107127481, filed Aug. 7, 2018, which areincorporated by reference herein in its entirety.

BACKGROUND Technical Field

The present disclosure relates to a camera module and an electronicdevice. More particularly, the present disclosure relates to a cameramodule and an electronic device using a leaf spring.

Description of Related Art

As the change of the times and the progressing of the technique, anelectronic device, such as mobile phones and computers, with the imagingfunction is gradually common. Therefore, the demand of the smallelectronic device with imaging function having high resolution is alsohigher and higher. The lens module of the current electronic deviceachieves the autofocus function by multiple elements, such as theconfiguration of leaf springs, which provide the moving freedom of theplastic barrel along the optical axis in the inner space of the lensmodule. Thus, as long as the length and design of the leaf springpermit, the moving range of the plastic barrel can over the inner space.However, when the plastic barrel moves over the moving range in theconventional design, it would result in the problem of mechanicalinterference, and the problem of the mechanical interference is usuallyaccompanied by abnormal sounds.

Accordingly, it is an important issue to resolve the problem to protectthe elements in the inner space from impact and decline the interferenceof the abnormal sounds.

SUMMARY

According to one aspect of the present disclosure, a camera moduleincludes a metal yoke, a holder, a plastic barrel, a plurality ofplastic lens elements and a plurality of metal conducting elements. Theholder is connected to the metal yoke for forming an inner space. Theplastic barrel is movably disposed in the inner space and includes atleast one buffering part. The plastic lens elements are disposed in theplastic barrel. The metal conducting elements are at least one leafspring and a wire element, wherein the metal conducting elements areconnected to the plastic barrel. Before the at least one buffering partcontacts a contacting part of the at least one leaf spring, a gapdistance between the at least one buffering part and the contacting partof the at least one leaf spring is d, and the following condition issatisfied:

0.0 mm<d<0.15 mm.

According to another aspect of the present disclosure, an electronicdevice includes the camera module according to the aforementioned aspectand an image sensor disposed on an image surface of the camera module.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure can be more fully understood by reading the followingdetailed description of the embodiment, with reference made to theaccompanying drawings as follows:

FIG. 1A is an exploded view of a camera module according to the 1stembodiment of the present disclosure.

FIG. 1B is another exploded view of the camera module according to the1st embodiment in FIG. 1A.

FIG. 2 is a schematic view of a plastic barrel according to the 1stembodiment in FIG. 1A.

FIG. 3A is a three-dimensional view of the plastic barrel according tothe 1st embodiment in FIG. 1A.

FIG. 3B is another three-dimensional view of the plastic barrelaccording to the 1st embodiment in FIG. 1A.

FIG. 3C is a bottom view of the plastic barrel according to the 1stembodiment in FIG. 1A.

FIG. 3D is a top view of the plastic barrel according to the 1stembodiment in FIG. 1A.

FIG. 4A is a top view of a lower leaf spring according to the 1stembodiment in FIG. 1A.

FIG. 4B is a projection area of a contacting part and a projection areaof a lower buffering part which are both along a direction from theplastic barrel to the holder according to the 1st embodiment in FIG. 1A.

FIG. 5 is a schematic view of the camera module according to the 1stembodiment in FIG. 1A.

FIG. 6 is a top view of a lower leaf spring of a camera module accordingto the 2nd embodiment of the present disclosure.

FIG. 7A is a schematic view of an electronic device according to the 3rdembodiment of the present disclosure.

FIG. 7B is another schematic view of the electronic device according tothe 3rd embodiment of the present disclosure.

FIG. 7C is a block diagram of the electronic device according to the 3rdembodiment of the present disclosure.

FIG. 8 is a schematic view of an electronic device according to the 4thembodiment of the present disclosure.

FIG. 9 is a schematic view of an electronic device according to the 5thembodiment of the present disclosure.

DETAILED DESCRIPTION

A camera module includes a metal yoke, a holder, a plastic barrel, aplurality of plastic lens elements and a plurality of metal conductingelements. The holder is connected to the metal yoke for forming an innerspace. The plastic barrel is movably disposed in the inner space andincludes at least one buffering part. The plastic lens elements aredisposed in the plastic barrel. The metal conducting elements are atleast one leaf spring and a wire element, wherein the metal conductingelements are connected to the plastic barrel. Before the at least onebuffering part contacts a contacting part of the at least one leafspring, a gap distance between the at least one buffering part and thecontacting part of the at least one leaf spring is d, and the followingcondition is satisfied: 0.0 mm<d<0.15 mm. In detail, the gap distancebetween the at least one buffering part and the contacting part of theat least one leaf spring is for ensuring that the plastic barrel of thecamera module in the present disclosure has a required focusingdistance. When the focusing distance of the plastic barrel exceeds thegap distance, the buffering part contacts the contacting part and thegap distance between them is zero, so the moving resistance for theplastic barrel is increased by the contacting part of the leaf spring tomake the plastic barrel gradually stop. It is ensures that the plasticbarrel does not continue to move toward the metal yoke or the holder foravoiding the mechanical interference and the accompanying abnormalsounds, so that the buffering effect is achieved.

Furthermore, the aforementioned gap distance between the at least onebuffering part and the at least one contacting part of the leaf springis d, the following condition can be satisfied: 0.0 mm<d<0.10 mm. Inthis way, the buffering effect under small volume is further achievedwithout hindering the original autofocus function.

The at least one leaf spring can include an inner side fixing part, anouter side fixing part, and an elastic part. The inner side fixing partis connected to the plastic barrel, the outer side fixing part isconnected to one of the metal yoke and the holder, and the elastic partis connected to the inner side fixing part and the outer side fixingpart. The structure of the aforementioned leaf spring could be directlyapplied to the original voice coil motor (VCM), as its necessary leafspring, without adding another buffering element for the aforementionedbuffering effect, so as to effectively decrease the volume and thecomponent number, and improve the convenience of assembly.

The outer side fixing part can include an auxiliary elastic portion,wherein the auxiliary elastic portion is connected to the contactingpart, thereby ensuring that the contacting part has elasticity. Whilethe contacting part contacts the buffering part, the auxiliary elasticportion could avoid the direct impact and has the effect for graduallyincreasing resistance. It is convenient to directly design on the leafspring of the original voice coil motor, so as to promote the productionefficiency of the leaf spring without making additional leaf springhaving buffering effect.

A width of the auxiliary elastic portion is t, and the followingcondition is satisfied: 0.05 mm<t<0.5 mm. If the width of the auxiliaryelastic portion is too narrow, it would make the buffering forceinsufficient, and the buffering effect is not good in a specificdistance. If the width of the auxiliary elastic portion is excessivelywide, it would make the buffering force excessively strong to easilyproduce additional metal impact sounds. Therefore, an appropriatebuffering force could be provided by the auxiliary elastic portion withan appropriate width.

The width of the auxiliary elastic portion is larger than a width of theelastic part. In this way, the buffering force of the plastic barrelmainly comes from the elasticity of the auxiliary elastic portion forideally control the buffering effect in a specific distance.

The width of the elastic part is w, the width of the auxiliary elasticportion is t, and the following condition is satisfied: 0.05<w/t<0.95.In this way, the maintenance of a ratio between the width of the elasticpart and the width of the auxiliary elastic portion is favorable forfine adjusting the slightly impact situation between the contacting partand the buffering part so as to ideally control the level of theabnormal sounds caused by the impact.

The plastic barrel can be a threadless structure. Therefore, the plasticbarrel could be directly assembled with the metal conducting elements todecrease the number of the carrier elements for further effectivelyreducing the volume of the camera module and decreasing the additionalassembly steps.

The at least one buffering part is correspondent to the at least onecontacting part, and an area of the at least one buffering part issmaller than an area of the at least one contacting part. In this way,the contacting area between the buffering part and the contacting partis avoided from extending to the auxiliary elastic portion. It isfavorable for not affecting an expected buffering effect and alsoreducing the situation that the plastic barrel is tilted after theplastic barrel is pushed.

The area of the at least one buffering part is Ab, the area of the atleast one contacting part is Ac, and the following condition issatisfied: 0.01<Ab/Ac<0.30. By a smaller area ratio, the frictionbetween the buffering part and the contacting part would be decreased tomake the buffering effect simpler, being not cause the additionalproblems.

The inner side fixing part, the elastic part, and the contacting part ofthe at least one leaf spring are arranged in a ring shape. In this way,the position of the contacting part is as far as possible to be close tothe plastic barrel for preventing the plastic barrel from tilting afterthe plastic barrel is pushed, simultaneously, decreasing the areaoccupied by the leaf spring.

The outer side fixing part of the at least one leaf spring is fartherfrom the plastic barrel than the contacting part from the plasticbarrel. In this way, the supporting fulcrums of the auxiliary elasticportions are all farther from the plastic barrel, so that the curvingdirections of each two of the auxiliary elastic portions are face eachother to eliminate the side stress perpendicular to an optical axis.

Before the plastic barrel contacts at least one of the metal yoke andthe holder, the at least one buffering part of the plastic barrelcontacts the contacting part of the leaf spring. When the focusingposition of the camera module is adjusted from a far position to a nearposition, the plastic barrel is close toward the image surface and thenis gradually away from the image surface, which causes the holder becomethe most easily collided element of the camera module. The contactingpart of the leaf spring, which contacts the buffering part in advance,could stop the collision in a limited distance before the plastic barrelcollides to the holder.

A number of the leaf spring is at least two, and the at least two leafsprings are respectively an upper leaf spring and a lower leaf spring.The upper leaf spring is connected to one end of the plastic barrelfarther from the holder, and the lower leaf spring is connected to theother end of the plastic barrel closer to the holder. The configurationof the upper leaf spring and the lower leaf spring provides the plasticbarrel with the degree of freedom along the optical axis in the innerspace formed by the metal yoke and the holder. When the leaf spring withbuffering effect is applied to the original voice coil motor, the cameramodule could be protected by the buffering effect under differentshooting scenes and maintain the best shooting effect.

A number of the buffering part is at least two, and the at least twobuffering parts are respectively an upper buffering part and a lowerbuffering part. The upper buffering part is connected to the end of theplastic barrel farther from the holder, the lower buffering part isconnected to the other end of the plastic barrel closer to the holder,and a projection of the upper buffering part and a projection of thelower buffering part which are both along a direction from the plasticbarrel to the holder are not overlapped. In this way, the elongatingaction and shortening action of the elastic part are avoided beingexcessively located on the specific positions without the bufferingparts, so as to prevent the excessive burden on the partial elasticpart.

The present disclosure also provides an electronic device, including theaforementioned camera module and an image sensor, wherein the imagesensor is disposed on an image surface of the camera module.Accordingly, when the electronic device is used, the problem ofmechanical interference and the accompanying abnormal sounds can beprevented.

According to the above descriptions, the specific embodiments andreference drawings thereof are given below so as to describe the presentdisclosure in detail.

1st Embodiment

FIG. 1A is an exploded view of a camera module 100 according to the 1stembodiment of the present disclosure. FIG. 1B is another exploded viewof the camera module 100 according to the 1st embodiment in FIG. 1A.FIG. 2 is a schematic view of a plastic barrel 140 according to the 1stembodiment in FIG. 1A. As shown in FIG. 1A, FIG. 1B, and FIG. 2, thecamera module 100 includes a metal yoke 110, a holder 150, a plasticbarrel 140, a plurality of plastic lens elements and a plurality ofmetal conducting elements 120. The holder 150 is connected to the metalyoke 110 for forming an inner space (reference number is not shown). Theplastic barrel 140 is movably disposed in the inner space and includesat least one buffering part. The plastic lens elements are disposed inthe plastic barrel 140. The metal conducting elements 120 are at leastone leaf spring and a wire element 122, which are connected to theplastic barrel 140.

In detail, the camera module 100 includes the metal yoke 110, the metalconducting elements 120, the plastic barrel 140, the plastic lenselements and the holder 150, and can further include a magnet 130 and animage surface 160. The metal yoke 110 is connected to the holder 150 forforming an inner space, and the plastic barrel 140 is a threadlessstructure and is movably disposed in the inner space. The magnet 130 isconnected to the plastic barrel 140, and the image surface 160 isdisposed on the image side of the camera module 100. The plastic lenselements are disposed in the plastic barrel 140, and the plastic lenselements are a first plastic lens element 141, a second plastic lenselement 142, a third plastic lens element 143, a forth plastic lenselement 144, a fifth plastic lens element 145, and a sixth plastic lenselement 146. The metal conducting elements 120 are an upper leaf spring121, a wire element 122 and a lower leaf spring 123. The upper leafspring 121, the wire element 122 and the lower leaf spring 123 aredirectly connected to the plastic barrel 140 without through otheradditional elements. The upper leaf spring 121 is connected to one endof the plastic barrel 140 farther from the holder 150, and the lowerleaf spring 123 is connected to the other end of the plastic barrel 140closer to the holder 150.

FIG. 3A is a three-dimensional view of a plastic barrel 140 according tothe 1st embodiment in FIG. 1A. FIG. 3B is another three-dimensional viewof the plastic barrel 140 according to the 1st embodiment in FIG. 1A.FIG. 3C is a bottom view of the plastic barrel 140 according to the 1stembodiment in FIG. 1A. FIG. 3D is a top view of the plastic barrel 140according to the 1st embodiment in FIG. 1A. As shown in FIG. 3A, FIG.3B, FIG. 3C, and FIG. 3D, the plastic barrel 140 includes at least onebuffering part. In detail, the plastic barrel 140 includes eightbuffering parts. One end of the plastic barrel 140 farther from theholder 150 includes four buffering parts, which are four upper bufferingparts 170. The other end of the plastic barrel 140 closer to the holder150 includes four buffering parts, which are four lower buffering parts180. Projections of the upper buffering parts 170 and projections of thelower buffering parts 180 which are both along a direction from theplastic barrel 140 to the holder 150 are not overlapped.

FIG. 4A is a top view of a lower leaf spring 123 according to the 1stembodiment in FIG. 1A. As shown in FIG. 4A, the lower leaf spring 123includes an inner side fixing part 124, an elastic part 125, an outerside fixing part 126 and a contacting part 127. The elastic part 125connects the inner side fixing part 124 and the outer side fixing part126. The outer side fixing part 126 is connected to the holder 150 andincludes an auxiliary elastic portion 128, which is connected to thecontacting part 127. The lower leaf spring 123 includes four contactingparts 127, being respectively correspondent to the four lower bufferingparts 180 of the plastic barrel 140 (as shown in FIG. 1B). The innerside fixing part 124, the elastic part 125, and the contacting part 127are arranged in a ring shape, and the auxiliary elastic portion 128 ofthe outer side fixing part 126 is farther from the plastic barrel 140than the contacting part 127 from the plastic barrel 140.

A width of the auxiliary elastic portion 128 is t, and the followingcondition is satisfied: 0.05 mm<t<0.5 mm. A width of the elastic part125 is w, the width t of the auxiliary elastic portion 128 is largerthan the width w of the elastic part 125, and the following condition issatisfied: 0.05<w/t<0.95. In the 1st embodiment, t is 0.14 mm, w is0.045 mm, and w/t is 0.32.

FIG. 4B is a projection area of the contacting part 127 of the lowerleaf spring 123 and a projection area of the lower buffering part 180 ofthe plastic barrel 140 which are both along a direction from the plasticbarrel 140 to the holder 150 according to the 1st embodiment in FIG. 1A.As shown in FIG. 4B, an area of the lower buffering part 180 is smallerthan an area of the contacting part 127. The area of the lower bufferingpart 180 is Ab, the area of the contacting part 127 is Ac, and thefollowing condition is satisfied: 0.01<Ab/Ac<0.30. In the 1stembodiment, Ab is 0.015 mm², Ac is 0.2413 mm², and Ab/Ac is 0.0622.

In the 1st embodiment of FIG. 1A, the configuration relationship betweenthe upper leaf spring 121 and the upper buffering part 170 is the sameas the aforementioned configuration relationship between the lower leafspring 123 and the lower buffering part 180, and will not be describedherein again.

FIG. 5 is a schematic view of the camera module 100 according to the 1stembodiment in FIG. 1A. As shown in FIG. 5, before the buffering partcontacts the contacting part of the leaf spring, a gap distance dbetween the buffering part and the contacting part of the leaf spring isd, and the following condition is satisfied: 0.0 mm<d<0.15 mm. Moreover,the following condition is satisfied: 0.0 mm<d<0.10 mm. In the 1stembodiment, a gap distanced between the buffering part and thecontacting part of the leaf spring is 0.09 mm (that is the gap distancebetween the upper buffering part 170 and the upper leaf spring 121),another gap distance d between the buffering part and the contactingpart of the leaf spring is 0.076 mm (that is the gap distance betweenthe lower buffering part 180 and the contacting part 127 of the lowerleaf spring 123). Furthermore, before the plastic barrel 140 contacts atleast one of the metal yoke 110 and the holder 150, the lower bufferingpart 180 of the plastic barrel 140 contacts the contacting part 127 ofthe lower leaf spring 123 first.

2nd Embodiment

FIG. 6 is a top view of a lower leaf spring 223 of a camera moduleaccording to the 2nd embodiment of the present disclosure. As shown inFIG. 6, the lower leaf spring 223 includes an inner side fixing part224, an elastic part 225, an outer side fixing part 226, and acontacting part 227, wherein the elastic part 225 connects the innerside fixing part 224 and the outer side fixing part 226, and the outerside fixing part 226 is connected to the holder (not shown in figures)and includes an auxiliary elastic portion 228, which is connected to thecontacting part 227. The lower leaf spring 223 includes four contactingparts 227, being respectively correspondent to four lower bufferingparts (not shown in figures) of the plastic barrel (not shown infigures). The inner side fixing part 224, the elastic part 225 and thecontacting part 227 are arranged in a ring shape, and the auxiliaryelastic portion 228 of the outer side fixing part 226 is farther fromthe plastic barrel than the contacting part 227 from the plastic barrel.Furthermore, the lower leaf spring 223 is directly connected to theplastic barrel without through other additional elements, and the lowerleaf spring 223 is connected to one end of the plastic barrel closer tothe holder.

A width of the auxiliary elastic portion 228 is t, and the followingcondition is satisfied: 0.05 mm<t<0.5 mm. A width of the elastic part225 is w, the width t of the auxiliary elastic portion 228 is largerthan the width w of the elastic part 225, and the following condition issatisfied: 0.05<w/t<0.95. In the 2nd embodiment, t is 0.05 mm, w is0.045 mm, and w/t is 0.9.

Furthermore, the other structures and the configuration of the cameramodule in the 2nd embodiment are the same as those in the 1stembodiment, and will not be described herein again.

3rd Embodiment

FIG. 7A is a schematic view of an electronic device 300 according to the3rd embodiment of the present disclosure. FIG. 7B is another schematicview of the electronic device 300 according to the 3rd embodiment of thepresent disclosure. As shown in FIG. 7A and FIG. 7B, the electronicdevice 300 of the 3rd embodiment is a smartphone and includes the cameramodule 301 according to the present disclosure and an image sensor 302.The image sensor 302 is disposed on an image surface (not shown infigures) of the camera module 301. Accordingly, it contributes to meetthe requirement of the appearance and the mass production of the imagingapparatus assembled on the electronic device in the current electronicdevice market.

Specifically, the user activates the capturing mode by the userinterface 303 of the electronic device 300, wherein the user interfaceof the 3rd embodiment can be a touch screen 303 a, a button 303 b, etc.At this moment, the camera module 301 converges imaging light on theimage sensor 302 and outputs electronic signals associated with imagesto an image signal processor (ISP) 304.

FIG. 7C is a block diagram of the electronic device 300 according to the3rd embodiment of the present disclosure, especially the block diagramof the camera of the electronic device 300. As shown in FIG. 7A, FIG. 7Band FIG. 7C, in response to the camera specification of the electronicdevice 300, the camera module 301 includes an imaging lens assembly 311(including a plastic barrel and a plastic lens element) and an autofocusassembly 305 (at least including a leaf spring which is not shown infigures), and can further include an optical anti-shake mechanism 306.Moreover, the electronic device 300 can further include at least oneauxiliary optical component 307 and at least one sensing component 308.The auxiliary optical component 307 can be a flash module forcompensating color temperatures, an infrared distance measurementcomponent, a laser focus module, etc. The sensing component 308 can havefunctions for sensing physical momentum and kinetic energies, such as anaccelerator, a gyroscope, and a hall effect element, so as to senseshaking or jitters applied by hands of the user or externalenvironments, thus the autofocus assembly 305 and the optical anti-shakemechanism 306 disposed on the camera module 301 can function to obtaingreat image quality and facilitate the electronic device 300 accordingto the present disclosure to have a capturing function with multiplemodes, such as taking optimized selfies, high dynamic range (HDR) with alow light source, 4K resolution recording, etc. Furthermore, the usercan visually see the captured image of the camera through the touchscreen and manually operate the view finding range on the touch screento achieve the auto focus function of what you see is what you get.

Furthermore, as shown in FIG. 7B, the camera module 301, the imagesensor 302, the sensing component 308 and the auxiliary opticalcomponent 307 can be disposed on a flexible printed circuit board (FPC)309 a and electrically connected with the associated elements, such asan image signal processor 304, by a connector 309 b so as to perform acapturing process. Because the current electronic devices, such assmartphone, have a tendency of being light and thin, the way ofdisposing the camera module, the imaging lens thereof and relatedelements on the flexible printed circuit board and then integrating thecircuit into the main board of the electronic device via the connectorcan satisfy the mechanical design of the limited space inside theelectronic device and the layout requirements, and obtain more margins.The autofocus function of the camera module can be controlled moreflexibly via the touch screen of the electronic device. In the 3rdembodiment, the electronic device 300 includes multiple sensingcomponents 308 and multiple auxiliary optical components 307, and thesensing components 308 and the auxiliary optical components 307 aredisposed on the flexible printed circuit board 309 a and at least oneother flexible printed circuit board (reference number is not shown),and electrically connected with the associated elements, such as animage signal processor 304, by a connector so as to perform a capturingprocess. In other embodiments (not shown in figures), the sensingcomponents and the auxiliary optical components can also be disposed onthe main board of the electronic device or carrier boards in other formsaccording to requirements of the mechanical design and the circuitlayout.

Moreover, the electronic device 300 can further include, but not belimited to, a display, a control unit, a storage unit, a random-accessmemory (RAM), a read-only memory (ROM), or the combination thereof.

4th Embodiment

FIG. 8 is a schematic view of an electronic device 400 according to the4th embodiment of the present disclosure. The electronic device 400 ofthe 4th embodiment is a tablet, and the electronic device 400 includes acamera module 401 according to the present disclosure and an imagesensor (not shown in figures), wherein the image sensor is disposed onan image surface (not shown in figures) of the camera module 401.

5th Embodiment

FIG. 9 is a schematic view of an electronic device 500 according to the5th embodiment of the present disclosure. The electronic device 500 ofthe 5th embodiment is a wearable device, and the electronic device 500includes a camera module 501 according to the present disclosure and animage sensor (not shown in figures), wherein the image sensor isdisposed on an image surface (not shown in figures) of the camera module501.

Although the present disclosure has been described in considerabledetail with reference to certain embodiments thereof, other embodimentsare possible. Therefore, the spirit and scope of the appended claimsshould not be limited to the description of the embodiments containedherein. It will be apparent to those skilled in the art that variousmodifications and variations can be made to the structure of the presentdisclosure without departing from the scope or spirit of the disclosure.In view of the foregoing, it is intended that the present disclosurecover modifications and variations of this disclosure provided they fallwithin the scope of the following claims.

What is claimed is:
 1. A camera module, comprising: a yoke; a holderconnected to the yoke for forming an inner space; a plastic barrelmovably disposed in the inner space; a plurality of plastic lenselements disposed in the plastic barrel; a plurality of metal conductingelements being at least one leaf spring and a wire element, wherein themetal conducting elements are connected to the plastic barrel, and theat least one leaf spring comprises: an inner side fixing part connectedto the plastic barrel; an outer side fixing part connected to one of theyoke and the holder; an elastic part connected to the inner side fixingpart and the outer side fixing part; and a contacting part integrallyformed with the at least one leaf spring; and at least one bufferingpart disposed in the inner space, wherein the at least one bufferingpart is correspondent to and faces the contacting part of the at leastone leaf spring; wherein before the at least one buffering part contactsthe contacting part of the at least one leaf spring, a gap distancebetween the at least one buffering part and the contacting part of theat least one leaf spring is d, and the following condition is satisfied:0.0 mm<d<0.15 mm.
 2. The camera module of claim 1, wherein the outerside fixing part comprises: an auxiliary elastic portion connected tothe contacting part, and a width of the auxiliary elastic portion is t,and the following condition is satisfied:0.05 mm<t<0.5 mm.
 3. The camera module of claim 1, wherein the plasticbarrel is a threadless structure.
 4. The camera module of claim 1,wherein the gap distance between the at least one buffering part and thecontacting part of the at least one leaf spring is d, and the followingcondition is satisfied:0.0 mm<d<0.10 mm.
 5. The camera module of claim 1, wherein the at leastone buffering part is correspondent to the at least one contacting part,and an area of the at least one buffering part is smaller than an areaof the at least one contacting part.
 6. The camera module of claim 5,wherein the area of the at least one buffering part is Ab, the area ofthe at least one contacting part is Ac, and the following condition issatisfied:0.01<Ab/Ac<0.30.
 7. The camera module of claim 1, wherein the inner sidefixing part, the elastic part, and the contacting part of the at leastone leaf spring are arranged in a ring shape.
 8. The camera module ofclaim 1, wherein the outer side fixing part of the at least one leafspring is farther from the plastic barrel than the contacting part fromthe plastic barrel.
 9. The camera module of claim 1, wherein before theplastic barrel contacts at least one of the yoke and the holder, the atleast one buffering part of the plastic barrel contacts the contactingpart of the at least one leaf spring.
 10. The camera module of claim 1,wherein a number of the at least one leaf spring is at least two, the atleast two leaf springs are respectively an upper leaf spring and a lowerleaf spring, the upper leaf spring is connected to one end of theplastic barrel farther from the holder, and the lower leaf spring isconnected to the other end of the plastic barrel closer to the holder.11. The camera module of claim 10, wherein a number of the bufferingpart is at least two, the at least two buffering parts are respectivelyan upper buffering part and a lower buffering part, the upper bufferingpart is connected to the end of the plastic barrel farther from theholder, the lower buffering part is connected to the other end of theplastic barrel closer to the holder, and a projection of the upperbuffering part and a projection of the lower buffering part which areboth along a direction from the plastic barrel to the holder are notoverlapped.
 12. An electronic device, comprising: the camera module ofclaim 1; and an image sensor disposed on an image surface of the cameramodule.